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Bisparse blind deconvolution through hierarchical sparse recovery
Umeå University, Faculty of Science and Technology, Department of Mathematics and Mathematical Statistics.ORCID iD: 0000-0003-3370-5528
Quantum Research Center, Technology Innovation Institute, Abu Dhabi, UAE.
Dahlem Center for Complex Quantum Systems, Freie Universität Berlin, Berlin, Germany.
2025 (English)In: Advances in Computational Mathematics, ISSN 1019-7168, E-ISSN 1572-9044, Vol. 51, no 6, article id 58Article in journal (Refereed) Published
Abstract [en]

The hierarchical sparsity framework, and in particular the HiHTP algorithm(Hierarchical Hard Thresholding Pursuit), has been successfully applied to many relevant communication engineering problems recently, particularly when the signal space is hierarchically structured. In this paper, the applicability of the HiHTP algorithm for solving the bi-sparse blind deconvolution problem is studied. The bi-sparse blind deconvolution setting here consists of recovering h and b from the knowledge of h*Qb, where Q is some linear operator, and both b and h are assumed to be sparse. The approach rests upon lifting the problem to a linear one, and then applying HiHTP, through the hierarchical sparsity framework. Then, for a Gaussian draw of the random matrix Q, it is theoretically shown that an s-sparse h in Rmu and sigma-sparse b in Rn with high probability can be recovered when s > C s*log(s)2*sigma*log(mu)*log(mu*n) + s*sigma*log(n) .

Place, publisher, year, edition, pages
Springer, 2025. Vol. 51, no 6, article id 58
National Category
Probability Theory and Statistics Mathematical Analysis
Research subject
Mathematics
Identifiers
URN: urn:nbn:se:umu:diva-247538DOI: 10.1007/s10444-025-10271-7ISI: 001630695000002Scopus ID: 2-s2.0-105023998742OAI: oai:DiVA.org:umu-247538DiVA, id: diva2:2020954
Funder
Knut and Alice Wallenberg FoundationGerman Research Foundation (DFG), 598/7-1German Research Foundation (DFG), 598/7-2German Research Foundation (DFG), 598/8-2German Research Foundation (DFG), 598/8-1Available from: 2025-12-12 Created: 2025-12-12 Last updated: 2025-12-15Bibliographically approved

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Flinth, Axel

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